Merge pull request #13 from aaronpk/updates

Fixes font name and supports 32-character secrets
Don't track configuration files with secret info.
Error handling and updated docs for sample configuration.
Add support for 64-character secrets
Added a simple if/else check on the secret value to decided on whether to decode
a 32 character secret vs. a 64 character secret. This fix enabled me to use the
64-character Amazon Web Services secret for MFA.
Merge pull request #14 from phardy/master

Improved configuration file handling
Add support for 64-character secrets

Merge branch '64-char-secret' of git://github.com/justindowning/authenticator
Updates README with a few more steps I had to do to get this installed. Was my first time building a Pebble app so hopefully it helps someone else too.